38
Ÿ Remove the timing hole cap with O-ring
(9). Rotate the cam sprocket (12)
clockwise using the special tool (13) until
the ‘T’ mark (10) on the flywheel
coincides with the index mark (11) on the
left crankcase cover. In this position, the
piston will either be on the compression or
exhaust stroke.
(9) Timing hole cap (10) 'T' mark
(11) Index mark
(12) Cam sprocket (13) Special tool
12
Intake : 0.08 mm
Ÿ Check the clearance by inserting the feeler
gauge (14) between the adjusting screw
(15) and valve stem (16).
Standard clearance (cold condition)
Exhaust : 0.12 mm
The adjustment must be made when the
piston is at top dead center and both the inlet
and exhaust valves are closed.
tight, the valves are open, rotate the cam
sprocket 360° clockwise and realign the 'T'
mark with the index mark.
This condition can be determined by moving
the rocker arms. If they are free, it is an
indication that the valves are closed and the
piston is in compression stroke. If they are
NOTE
Before inserting the feeler gauge, smear a bit
of engine oil on the feeler gauge to avoid
damage to the feeler gauge.
(14) Feeler gauge (15) Adjusting screw
(16) Valve stem (17) Lock nut
14
10
11
9
13
16
17 15
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